CN103589989A - Surface processing method of common cast iron cookware - Google Patents
Surface processing method of common cast iron cookware Download PDFInfo
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- CN103589989A CN103589989A CN201210292143.5A CN201210292143A CN103589989A CN 103589989 A CN103589989 A CN 103589989A CN 201210292143 A CN201210292143 A CN 201210292143A CN 103589989 A CN103589989 A CN 103589989A
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Abstract
The invention discloses a surface processing method of common cast iron cookware. The surface processing method comprises following steps: firstly, the common cast iron cookware is subjected to catalytic gas oxynitrocarburizing so as to form a compact nitrogen-carbon-oxygen-iron compound coating on the surface, wherein the thickness of the coating is 35 to 70 <mu>m, hardness is Hv[0.1]500-700, neutral salt spray test NSS>=2hr (rust spot indiffusion time); then the common cast iron cookware is subjected to surface polishing treatment; and at last the common cast iron cookware is subjected to low-temperature oxidation so as to form a compact oxidation layer. The surface processing method is capable of increasing wear resistance, corrosion resistance and high temperature resistance of the common cast iron cookware greatly.
Description
Technical field
The present invention relates to wear-resistant, corrosion-resistant, the resistant to elevated temperatures surface treatment method on a kind of plain cast iron pan surface.
Background technology
Iron pan is the conventional daily bread utensil of China, generally adopts grey cast iron, its carbon content higher (2.7%～4.0%), and carbon mainly exists with flake graphite form, and fracture gray is called for short gray iron.Fusing point low (1145～1250 ℃), while solidifying, shrinkage is little, and ultimate compression strength and hardness approach carbon steel, and density is 7.22g/cm conventionally
3its surface is antirust without coating, Wear-resistant Treatment is a kind of trend, because its casting technique easily produces micro-pore or tiny crack, to next step, require surface abrasion resistance or the surface treatment of anti-oxidant, corrosion resistant cast iron pan to bring hidden danger of quality, as all many in carried out the quality problems of the surface treatments such as nitrogenize, QPQ salt bath on conventional cast iron pan.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind ofly carries out surface-treated method to plain cast iron pan, to improve the ability of wear resistance, corrosion resistance nature and the antifatigue cracking of parts.This technical problem is solved like this:
This surface treatment method comprises the following steps, and 1. first pan carries out degrease, acidic activated, deionized water wash clean; 2. then this pan is dried, remove surperficial residuary water; 3. then this pan being carried out to temperature is again 480-520 ℃, the step gas that the time is 30～150min
processing is oozed in the catalysis of nitrogen carbon oxygen altogether, make diffusion layer organization thickness reach 35～70 μ m; 4. then this pan is sandblasted or shot peening, remove the tectorium of compound layer outside; 5. again this cast iron pan being carried out to temperature is 300～400 ℃, and the time is 10～60min oxide treatment, makes diffusion layer organization surface coverage zone of oxidation.Wherein step 3.～5. at least repeat once, preferably repeat 1-3 time, further preferably repeat 2-3 time.
Wherein in step, processing is oozed in the step the GN 2 carbon oxygen catalysis in 3. altogether, is the mixed gas building-up reactions that adopts chirality nitrogen oxygen-metal complex and ammonia in vacuum nitriding furnace.In temperature, it is 480～520 ℃, the equal ionization of chirality nitrogen oxygen-metal complex and ammonia, be easy to quick and pan formation nitrogen carbon oxygen iron cpd, and the diffusion layer organization of traditional " nitriding ", " carburizing " not only Brittleness greatly, easily peel off, can not meet high life cast iron pan high surface hardness, corrosion-resistant, high temperature resistant, the requirement that improves fatigue strength, and liquid QPQ salt bath is difficult to use in the parts of blind hole and aperture especially cast iron pan completely simultaneously.Adopt chirality nitrogen oxygen-metal complex and ammonia carrier to cast iron pan one step the GN 2 carbon oxygen catalysis to ooze altogether processing be that the present invention is different from the surface modifications such as traditional nitriding sulfurizing.
Above-mentioned is the mixture of nitrogenous compound and titanium-containing compound containing chirality nitrogen oxygen-metal complex, and mass ratio is between the two 80: 1-1: 80, preferably 80: 20-20: 80, more preferably 60: 40-40: 60.
Containing chirality nitrogen oxygen-metal complex, be wherein at least one of dinitrogen oxygen-amide compound, oxo bridge Binuclear Ti complex compound.
Embodiment
Below in conjunction with embodiment, cast iron pan surface treatment method of the present invention is described in further detail, listed embodiment is indefiniteness embodiment of the present invention below, about cast iron materials composition proportion and processing parameter of the present invention, can adjust in the scope allowing, this adjustment does not have substantial effect to the present invention.
The cast iron pan of processing by the present invention, tests according to < < JB/T boride layer microstructure hardness and layer depth detection method > >, and hardness can reach Hv
0.1500～700, neutral salt spray test can reach NSS >=2hr (rust spot indiffusion time).
Embodiment mono-
These routine goods adopt regular gray iron material, and density is 7.2g/cm
3, on this pan, carry out surface treatment of the present invention.
Degreasing decontamination is processed and is adopted the commercially available chemistry RR-602 of Du Pont activator, at 25～40 ℃, and ultrasonic cleaning 3～15min; Acid-wash activation is processed and is adopted the chemistry RR-602 of nation activator, 25～40 ℃, ultrasonic cleaning 5～1min; Washing is all carried out in deionized water at normal temperature; Then go up IR bake, 220～340 ℃ of temperature, 1 hour time.
Then this pan being carried out to temperature is again 520 ℃, the step gas that the time is 150min
processing is oozed in the catalysis of nitrogen carbon oxygen altogether:
Come out of the stove after cooling and carry out shot peening;
Finally carrying out oxidation temperature is 350 ℃, and the treatment time is 120min;
After above-mentioned surface treatment, in Cast Iron Surface, form the Dan Tanyangtie chemical combination organized layer of 70 μ m left and right thicknesses, at outermost surface, be coated with zone of oxidation, the surface hardness of cast iron is about Hv
0.1700; Neutral salt spray test NSS >=4hr (rust spot indiffusion time).
Embodiment bis-
These routine goods adopt regular gray iron material, and density is 7.1g/cm
3, on this pan, carry out surface treatment of the present invention.
Degreasing decontamination is processed and is adopted the commercially available chemistry RR-602 of Du Pont activator, at 25～40 ℃, and ultrasonic cleaning 3～15min; Acid-wash activation is processed and is adopted the chemistry RR-602 of Du Pont activator, 25～40 ℃, ultrasonic cleaning 5～10min; Washing is all carried out in deionized water at normal temperature; Then go up IR bake, 220～340 ℃ of temperature, 1 hour time.
Then this pan being carried out to temperature is again 520 ℃, the step gas that the time is 120min
processing is oozed in the catalysis of nitrogen carbon oxygen altogether;
Come out of the stove after cooling and carry out shot peening;
Finally carrying out oxidation temperature is 350 ℃, and the treatment time is 120min;
After above-mentioned surface treatment, in Cast Iron Surface, form the Dan Tanyangtie chemical combination organized layer of 60 μ m left and right thicknesses, at outermost surface, be coated with zone of oxidation, the surface hardness of cast iron is about Hv0.1610; Neutral salt spray test NSS >=3.5hr (rust spot indiffusion time).
Embodiment tri-
These routine goods adopt regular gray iron material, and density is 7.2g/cm
3, on this pan, carry out surface treatment of the present invention.
Degreasing decontamination is processed and is adopted the commercially available chemistry RR-602 of Du Pont activator, at 25～40 ℃, and ultrasonic cleaning 3～15min; Acid-wash activation is processed and is adopted the chemistry RR-602 of Du Pont activator, 25～40 ℃, ultrasonic cleaning 5～10min; Washing is all carried out in deionized water at normal temperature; Then go up IR bake, 220～340 ℃ of temperature, 1 hour time.
Then this pan being carried out to temperature is again 490 ℃, the step gas that the time is 150min
processing is oozed in the catalysis of nitrogen carbon oxygen altogether:
Come out of the stove after cooling and carry out shot peening;
Finally carrying out oxidation temperature is 350 ℃, and the treatment time is 120min;
After above-mentioned surface treatment, in Cast Iron Surface, form the Dan Tanyangtie chemical combination organized layer of 60 μ m left and right thicknesses, at outermost surface, be coated with zone of oxidation, the surface hardness of cast iron is about Hv
0.1520; Neutral salt spray test NSS >=3hr (rust spot indiffusion time).
Claims (8)
1. a surface treatment method for plain cast iron pan, comprises the following steps:
(1) plain cast iron material is carried out to degrease, acidic activated, deionization washing processing successively;
(2) object after the processing of abovementioned steps gained is dried, remove surperficial residuary water;
(3) object of abovementioned steps gained is carried out to step the GN 2 carbon oxygen catalysis and ooze altogether processing, after processing, diffusion layer organization thickness can reach 35～70 microns;
(4) polished finish, removes surface porosity layer;
(5) oxide treatment, makes its surface cover the zone of oxidation of one deck densification again.
2. method claimed in claim 1, is characterized in that step c)～e) repeat more than 1 time.
3. the method described in claim 1 or 2, is characterized in that described step the GN 2 carbon oxygen catalysis oozes to be treated to altogether in vacuum nitriding furnace, to adopt the mixed gas containing chirality nitrogen oxygen-metal complex and ammonia of gaseous state to process.
4. method claimed in claim 3, is characterized in that it is 480～520 ℃ that the temperature of processing is oozed in described step the GN 2 carbon oxygen catalysis altogether, and the time is 30～150min.
5. method claimed in claim 3, is the mixture of nitrogenous compound and titanium-containing compound containing chirality nitrogen oxygen-metal complex described in it is characterized in that, mass ratio is between the two 80: 1-1: 80.
6. the method described in claim 1-6, is characterized in that steps d) described in polished finish be shot peening.
7. the method described in claim 1-6, is characterized in that step e) described in oxidation temperature be 300～400 ℃, the time is 10～60min.
8. the material that the method described in claim 1-8 forms, is characterized in that the top layer of the part after processing forms 35-70 micron, hardness up to Hv
0.1500～Hv
0.1700 superhard surfaces organized layer; Neutral salt spray test can reach NSS >=2hr (rust spot indiffusion time).
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| CN201210292143.5A CN103589989A (en) | 2012-08-16 | 2012-08-16 | Surface processing method of common cast iron cookware |
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| CN201210292143.5A CN103589989A (en) | 2012-08-16 | 2012-08-16 | Surface processing method of common cast iron cookware |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106498337A (en) * | 2016-10-26 | 2017-03-15 | 邢台三厦铸铁有限公司 | The method is surface-treated by cast iron cooker and cast iron cooker |
| CN106702312A (en) * | 2015-07-20 | 2017-05-24 | 佛山市顺德区美的电热电器制造有限公司 | Method for treating iron-based pan and iron-based pan |
| CN106835009A (en) * | 2017-02-28 | 2017-06-13 | 邢台三厦铸铁有限公司 | The surface treatment method of cast iron cooker product |
| CN109913737A (en) * | 2019-05-05 | 2019-06-21 | 宁波浩渤涂覆科技有限公司 | High-strength bolt and preparation method thereof |
| CN110257761A (en) * | 2019-06-14 | 2019-09-20 | 武汉汇九厨具科技有限公司 | A kind of not viscous iron pan of method of no-coating abrasion-proof antirust and its manufacturing process |
| CN110653375A (en) * | 2018-06-29 | 2020-01-07 | 中国科学院苏州纳米技术与纳米仿生研究所 | Layered composite material and preparation method and application thereof |
-
2012
- 2012-08-16 CN CN201210292143.5A patent/CN103589989A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702312A (en) * | 2015-07-20 | 2017-05-24 | 佛山市顺德区美的电热电器制造有限公司 | Method for treating iron-based pan and iron-based pan |
| CN106498337A (en) * | 2016-10-26 | 2017-03-15 | 邢台三厦铸铁有限公司 | The method is surface-treated by cast iron cooker and cast iron cooker |
| CN106835009A (en) * | 2017-02-28 | 2017-06-13 | 邢台三厦铸铁有限公司 | The surface treatment method of cast iron cooker product |
| CN110653375A (en) * | 2018-06-29 | 2020-01-07 | 中国科学院苏州纳米技术与纳米仿生研究所 | Layered composite material and preparation method and application thereof |
| CN110653375B (en) * | 2018-06-29 | 2022-04-01 | 中国科学院苏州纳米技术与纳米仿生研究所 | Layered composite material and preparation method and application thereof |
| CN109913737A (en) * | 2019-05-05 | 2019-06-21 | 宁波浩渤涂覆科技有限公司 | High-strength bolt and preparation method thereof |
| CN109913737B (en) * | 2019-05-05 | 2020-04-28 | 宁波浩渤涂覆科技有限公司 | High-strength bolt and preparation method thereof |
| CN110257761A (en) * | 2019-06-14 | 2019-09-20 | 武汉汇九厨具科技有限公司 | A kind of not viscous iron pan of method of no-coating abrasion-proof antirust and its manufacturing process |
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Application publication date: 20140219 |